Simplifying Negative Exponents: (a^4/b^2)^-8

(a4b2)8=? (\frac{a^4}{b^2})^{-8}=\text{?}

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Simplify the following problem
00:03 In order to eliminate a negative exponent
00:07 We'll flip the numerator and the denominator so that the exponent will become positive
00:12 For example
00:16 We'll apply the formula in order to convert from a fraction to a number with a negative exponent
00:21 When there's an exponent on a product of terms, each factor is raised to that power
00:29 We'll apply this formula to our exercise
00:36 When there's a power of a power, the resulting exponent is the product of the exponents
00:44 We'll apply this formula to our exercise and multiply the exponents
00:49 We'll calculate the exponents, and that's the solution to the question

Step-by-step written solution

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1

Understand the problem

(a4b2)8=? (\frac{a^4}{b^2})^{-8}=\text{?}

2

Step-by-step solution

To solve this problem, we'll simplify the expression using exponent rules:

  • Step 1: Apply the negative exponent rule.
    The expression (a4b2)8 \left(\frac{a^4}{b^2}\right)^{-8} with a negative exponent can be rewritten using the reciprocal:
    (a4b2)8=1(a4b2)8 \left(\frac{a^4}{b^2}\right)^{-8} = \frac{1}{\left(\frac{a^4}{b^2}\right)^{8}}
  • Step 2: Apply the power of a quotient rule.
    Using (xy)n=xnyn \left(\frac{x}{y}\right)^n = \frac{x^n}{y^n} , we have:
    1(a4b2)8=1(a4)8(b2)8=1a32b16 \frac{1}{\left(\frac{a^4}{b^2}\right)^{8}} = \frac{1}{\frac{(a^4)^8}{(b^2)^8}} = \frac{1}{\frac{a^{32}}{b^{16}}}
  • Step 3: Simplify by taking the reciprocal of the fraction.
    Thus, 1a32b16=b16a32\frac{1}{\frac{a^{32}}{b^{16}}} = \frac{b^{16}}{a^{32}} , which can be rewritten using exponent rules as b16a32 b^{16}a^{-32} .

Therefore, the simplified expression is b16a32 b^{16}a^{-32} .

Given the multiple-choice options, the correct choice is the one that matches our final result.

Therefore, the solution to the problem is b16a32 b^{16}a^{-32} .

3

Final Answer

b16a32 b^{16}a^{-32}

Practice Quiz

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Insert the corresponding expression:

\( \left(\frac{2}{3}\right)^a= \)

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